Why More Women Are Giving Birth During Natural Disasters

It's a phenomenon that's been seen before.

Hospitals around Houston have been reporting a spike in births since Hurricane Harvey struck Texas.

Read: How You Can Help the Victims of Hurricane Harvey

Experts in the field of childbirth believe heavy rain storms and hurricanes can sometimes trigger labor for moms-to-be.

ABC News Chief Health and Medical Correspondent Dr. Jennifer Ashton is in Texas assisting flood victims and spoke about how real the phenomenon could be.

“Anecdotally, any obstetrician or midwife will tell you that when there's a full moon or some rain or a drop in barometric pressure, we tend to see a lot of deliveries, a lot of women breaking their water,” she told Good Morning America. “There's no medical or scientific explanation for that really.”

Dr. Ashton's medical kit contains some unusual items for brand-new moms, which she displayed on GMA.

It includes basic dressings for cuts or wounds, antibiotics and shoelaces, which can be used to tie off an umbilical cord.

Read: Rescuers Race to Save Pets Left Behind in Hurricane Harvey

Dr. Ashton arrived in Texas after the city of Houston issued an appeal for medical personnel: "If you can safely get [to the convention center], go!"

She's says expectant moms are especially vulnerable due to stress.

Watch: Miracle Baby: Mom Gives Birth in Home During Hurricane Harvey